Seat ventilation device and automobile seat

Abstract

This application discloses a seat ventilation device and an automobile seat. It includes: a support pad having a ventilation area, a fan positioned at the center of the ventilation area, the fan having an axial air inlet and a circumferential air outlet; an air guide structure disposed within the ventilation area; the air guide structure having an opening corresponding to the axial air inlet and surrounding the fan; the air guide structure communicating with the circumferential air outlet; a sealing layer connected to the edge of the air guide structure, and having an opening corresponding to the axial air inlet on the sealing layer; and ventilation holes located within the ventilation area and communicating with the air guide structure. Therefore, by setting an air guide structure between the ventilation holes and the fan, the air transmitted by the fan can smoothly reach the corresponding ventilation holes for ventilation, meeting the fan's ventilation requirements. Positioning the fan at the center of the ventilation area ensures that the airflow reaching each ventilation hole is relatively consistent, improving the uniformity of ventilation.

Description

Technical Field

[0001] This disclosure generally relates to the field of automotive seat ventilation equipment technology, and specifically to a seat ventilation device and an automotive seat. Background Technology

[0002] As people's living standards continue to improve, their demands for car ride comfort are also increasing. Among these demands, the ventilation of car seats is a crucial factor affecting car seat comfort.

[0003] Currently, some high-end cars on the market already have ventilation functions, such as... Figure 1 As shown, traditional ventilation equipment consists of a fan (2) mounted on the upper part of the seat support cushion (1), with air ducts arranged in the middle and lower parts of the support cushion (1) and connected to the air outlet of the fan (2). The air ducts have multiple rows of ventilation holes, each extending from the air outlet of the fan along the air outlet direction. When using the above equipment, the air volume of the rows of ventilation holes close to the fan outlet meets the requirements, while the air volume of the rows of ventilation holes relatively far from the fan outlet is too large to meet the requirements. Furthermore, the airflow at each ventilation hole is uneven, resulting in the overall ventilation volume of the equipment failing to meet the standards and affecting the comfort of the passengers. Therefore, we propose a seat ventilation device and a car seat to solve the above problems. Summary of the Invention

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a seat ventilation device and car seat that is highly versatile, improves the uniformity and effect of equipment ventilation, and ensures riding comfort.

[0005] In a first aspect, this application provides a seat ventilation device, comprising:

[0006] The support pad has a ventilation area, and a fan is provided at the center of the ventilation area. The fan has an axial air inlet and a circumferential air outlet.

[0007] An air guide structure is disposed in the ventilation area; the air guide structure has an opening corresponding to the axial air inlet, and the air guide structure is disposed around the fan; the air guide structure is connected to the circumferential air outlet.

[0008] A sealing layer is connected to the edge of the air guide structure, and the sealing layer has an opening corresponding to the axial air inlet;

[0009] Ventilation openings are provided in the ventilation area and are connected to the air guiding structure.

[0010] According to the technical solution provided in the embodiments of this application, the air guiding structure includes:

[0011] An air guide channel is formed on the supporting pad and is connected to the ventilation hole; the edge of the air guide channel opening is connected to the sealing layer;

[0012] An air guide cavity is formed between the air guide groove and the sealing layer, and the air guide cavity is connected to the circumferential air outlet.

[0013] According to the technical solution provided in the embodiments of this application, the air guiding structure includes:

[0014] The mounting slot is formed in the ventilation area of ​​the support pad;

[0015] An air guide plate is disposed in the mounting groove; the air guide plate has an opening corresponding to the axial air inlet, and the fan is installed on the side of the air guide plate near the bearing pad.

[0016] The fan has multiple sets of air guide protrusions arranged on the air guide plate along the circumference of the fan; an air guide channel is formed between two adjacent sets of air guide protrusions, and the air guide channel is connected to the ventilation hole and the circumferential air outlet.

[0017] According to the technical solution provided in the embodiments of this application, the air guiding direction of the air guiding channel is consistent with the air outlet direction of the circumferential air outlet.

[0018] The technical solution provided according to the embodiments of this application also includes:

[0019] The first wire harness hole is formed on the air guide plate;

[0020] The second wire harness hole is formed on the sealing layer;

[0021] The fan's wiring harness passes through the first wiring harness hole and the second wiring harness hole in sequence and is electrically connected to the circuit control structure of the seat.

[0022] According to the technical solution provided in the embodiments of this application, the air guiding structure includes:

[0023] The mounting slot is formed on the support pad and is arranged around the fan;

[0024] A three-dimensional knitted mesh is filled inside the mounting groove.

[0025] According to the technical solution provided in the embodiments of this application, the air guiding structure includes:

[0026] The mounting groove is formed on the support pad;

[0027] The system comprises an air distribution layer and an air guide pressure-bearing layer, wherein the air distribution layer is provided with air distribution holes; the edges of the air distribution layer and the sealing layer are sealed together; the air guide pressure-bearing layer is disposed between the air distribution layer and the sealing layer, and the air distribution layer, the air guide pressure-bearing layer and the sealing layer together form a ventilation bag; the air guide pressure-bearing layer is provided with a space to accommodate the fan;

[0028] The ventilation bag is disposed in the mounting groove, and the air distribution layer is in contact with the surface of the mounting groove; the fan is installed inside the ventilation bag, and the air distribution hole of the ventilation bag is connected to the circumferential air outlet and the ventilation hole.

[0029] According to the technical solution provided in the embodiments of this application, the air guiding structure includes:

[0030] The mounting groove is formed on the support pad and is arranged around the fan.

[0031] There are several air guide protrusions, which are arranged in the mounting groove; the air guide protrusions form a channel that communicates with the circumferential air outlet and the ventilation hole.

[0032] According to the technical solution provided in the embodiments of this application, the diameter of the ventilation hole gradually increases with the increase of the radius of the circle centered on the center of the fan.

[0033] According to the technical solution provided in the embodiments of this application, the sealing layer is non-woven fabric, non-woven felt, coated non-woven fabric, TPU film, or PU film.

[0034] Secondly, this application provides an automobile seat, including: a seat back body and a seat cushion body; the seat back body and / or seat cushion body are provided with the aforementioned seat ventilation device.

[0035] In summary, this application specifically discloses a specific structure of a seat ventilation device. This application involves placing a fan at the center of the ventilation area of ​​the support cushion, the fan having an axial air inlet and a circumferential air outlet; a guide structure is provided in the ventilation area, the guide structure having an opening corresponding to the axial air inlet, and the guide structure surrounds the fan and communicates with the circumferential air outlet; furthermore, a sealing layer is connected to the edge of the guide structure to seal the side of the guide structure away from the support cushion, ensuring that the guide structure can only conduct air to the ventilation holes during airflow, guaranteeing the final ventilation effect; and the sealing layer has an opening corresponding to the axial air inlet, allowing the axial air inlet to smoothly enter and ensuring the normal operation of the fan.

[0036] Therefore, by setting up an air guide structure between the ventilation holes and the fan, the air transmitted by the fan can smoothly reach the corresponding ventilation holes for ventilation, thus meeting the ventilation requirements of the fan. Furthermore, by placing the fan in the central area of ​​the ventilation zone, the airflow from the fan is formed in a radiating pattern from the fan as the center, ensuring that the air volume reaching each ventilation hole is relatively consistent and improving the uniformity of equipment ventilation. Attached Figure Description

[0037] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0038] Figure 1 This is a schematic diagram of the structure of a traditional ventilation system.

[0039] Figure 2 This is a schematic diagram of the first layout of the air guiding structure.

[0040] Figure 3 This is a front view schematic diagram of the second layout of the air guiding structure.

[0041] Figure 4 This is a schematic diagram of the second layout of the air guiding structure.

[0042] Figure 5 This is a schematic diagram of the air guide plate and the fan.

[0043] Figure 6 This is a schematic diagram of the fan structure.

[0044] Figure 7 This is a schematic diagram of the third layout of the air guiding structure.

[0045] Figure 8 This is a schematic diagram of the structure of a three-dimensional knitted mesh fabric.

[0046] Figure 9 This is a schematic diagram of the fourth layout of the air guiding structure.

[0047] Figure 10 This is a schematic diagram of the ventilation bag structure.

[0048] Figure 11 This is a schematic diagram of the fifth layout of the air guiding structure.

[0049] The following are the labeling elements in the diagram: 1. Support pad; 2. Fan; 3. Axial air inlet; 4. Circumferential air outlet; 5. Sealing layer; 6. Ventilation hole; 7. Air guide cavity; 8. Air guide plate; 9. Air guide protrusion; 10. Air guide channel; 11. First wire harness hole; 12. Second wire harness hole; 13. Three-dimensional knitted mesh fabric; 14. Ventilation bag; 15. Support spring frame; 16. Soft layer; 17. Skin. Detailed Implementation

[0050] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0051] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0052] Example 1

[0053] Please refer to Figure 2 The schematic diagram shown below illustrates a first embodiment of a seat ventilation device provided in this application, comprising:

[0054] The support pad 1 has a ventilation area, and a fan 2 is provided at the center of the ventilation area. The fan 2 has an axial air inlet 3 and a circumferential air outlet 4.

[0055] An air guide structure is disposed in the ventilation area; the air guide structure has an opening corresponding to the axial air inlet 3, and the air guide structure is disposed around the fan 2; the air guide structure is connected to the circumferential air outlet 4.

[0056] A sealing layer 5 is connected to the edge of the air guide structure, and the sealing layer 5 has an opening corresponding to the axial air inlet 3;

[0057] Ventilation hole 6 is provided in the ventilation area and is connected to the air guiding structure.

[0058] In this embodiment, the supporting pad 1 has a ventilation area, which has a ventilation function; and a fan 2 is provided at the center of the ventilation area to provide ventilation; wherein, the fan 2 has an axial air inlet 3 and a circumferential air outlet 4, i.e. Figure 6 As shown, the axial air inlet 3 is located on the central axis of the fan 2, and the circumferential air outlet 4 is opened around the fan 2. The air is blown out along the radial periphery of the fan. The opening position of the circumferential air outlet 4 may be blocked by the connection position between the upper and lower housings of the fan 2.

[0059] Here, the type of fan 2 is, for example, a centrifugal fan; the air guiding method of the centrifugal fan is axial air intake and radial air exhaust.

[0060] An air guide structure is provided in the ventilation area. The air guide structure has an opening corresponding to the axial air inlet 3 and is arranged around the fan 2. The air guide structure is connected to the circumferential air outlet 4.

[0061] The sealing layer 5 is connected to the edge of the air guide structure, that is, the sealing layer 5 can be connected to the bearing pad 1 near the edge of the air guide structure, thereby sealing the air guide structure and avoiding uncertainty in the air guide direction, which would affect the final ventilation effect; in addition, the sealing layer 5 has an opening corresponding to the axial air inlet 3, so that the axial air inlet 3 can smoothly take in air, ensuring that the fan 2 can normally take in air from the external environment.

[0062] Here, the type of sealing layer 5 is, for example, a material with poor breathability such as non-woven fabric, non-woven felt, laminated non-woven fabric, TPU film, or PU film.

[0063] Ventilation hole 6 is located in the ventilation area and is connected to the air guiding structure. That is, under the premise that the air guiding structure is sealed, the air guiding structure guides the air into ventilation hole 6 to achieve the best ventilation effect.

[0064] Here, the specific location and number of ventilation holes 6 can be set according to customer needs. Generally, there is more than one ventilation hole 6. Most of the ventilation holes 6 are located in the area covered by the human body, but a small number of ventilation holes 6 can be located outside the area covered by the human body. Ventilation holes 6 can also be not set outside the area covered by the human body. Furthermore, there are no restrictions on the distribution of ventilation holes 6; they can be evenly distributed or unevenly distributed.

[0065] Specifically, such as Figure 2 As shown, the air guiding structure includes:

[0066] An air guide trough is formed on the supporting pad 1 and is connected to the ventilation hole 6. The edge of the air guide trough opening is connected to the sealing layer 5, that is, the air guide trough is sealed by the sealing layer 5 to form an air guide cavity 7. The air guide cavity 7 is connected to the circumferential air outlet 4. During ventilation, the air passes through the axial air inlet 3, the circumferential air outlet 4 and the air guide cavity 7 in sequence, and is finally sent into the ventilation hole 6 to achieve the purpose of ventilation.

[0067] Furthermore, within the radius of the circle centered on the center of fan 2, the diameter of the ventilation hole 6 gradually increases with the increase of the radius, making the airflow of the ventilation hole 6 at each position relatively uniform and the ventilation more uniform.

[0068] Due to the special airflow guidance form of the fan 2 with axial air intake and circumferential air outlet, an airflow guidance structure is set between the ventilation hole 6 and the fan 2, so that the air transmitted by the fan 2 can smoothly reach the corresponding ventilation hole 6 for ventilation, meeting the ventilation needs of the fan 2. Furthermore, the fan 2 is set in the central area of ​​the ventilation area, and the air outlet of the fan 2 forms a form that radiates outward from the fan 2 in a circumferential manner, so that the air volume reaching each ventilation hole 4 is relatively consistent, improving the uniformity of seat ventilation.

[0069] Example 2

[0070] This embodiment, based on embodiment 1, designs the air guide structure as follows: Figure 3 , Figure 4 Specifically, as shown, the air guiding structure includes:

[0071] The mounting slot is located in the ventilation area of ​​the bearing pad 1 and is used to install the air guide plate 8.

[0072] An air guide plate 8 is installed in the mounting groove; the air guide plate 8 has an opening corresponding to the axial air inlet 3 to facilitate air intake through the axial air inlet 3; and a fan 2 is installed on the side of the air guide plate 8 near the bearing pad 1, such as... Figure 5 As shown, the air guide plate 8 can be connected to the mounting through hole of the fan 2 by means of a rivet; the sealing layer 5 encapsulates the air guide plate 8, on which the fan 2 is mounted, in the mounting groove on the bearing pad 1;

[0073] There are multiple sets of air guide protrusions 9, which are arranged on the air guide plate 8 along the circumference of the fan 2. An air guide channel 10 is formed between two adjacent sets of air guide protrusions 9, and the air guide channel 10 is connected to the ventilation hole 6 and the circumferential air outlet 4. During ventilation, the air passes through the axial air inlet 3, the circumferential air outlet 4 and the air guide channel 10 in sequence, and is finally sent into the ventilation hole 6 to achieve the purpose of ventilation.

[0074] Among them, the air guide protrusion 9, for example, is Figure 5 As shown in the figure, each independent "crescent" structure is a guide protrusion 9, and an air guide channel 10 is formed between two adjacent guide protrusions 9; furthermore, the guide protrusion 9 can also be formed by arranging and combining several independent small protrusions in a circumferential direction towards the air outlet 4; here, "small" in small protrusion means that the size of the small protrusion is smaller than the size of the aforementioned "crescent" structure; "several" means that the number of small protrusions is at least three.

[0075] Here, the type of air guide plate 8 is, for example, a plastic sheet. Furthermore, the air guide protrusion 9 can be made of the same material as the air guide plate 8 and integrally formed with the air guide plate 8. For example, the air guide protrusion 9 can be formed by vacuum forming or blow forming, which is convenient for molding and easy for subsequent assembly. Alternatively, the air guide protrusion 9 can be made of a different material than the air guide plate 8 and then installed on the plastic sheet. This allows the position and shape of the air guide protrusion 9 to be adjusted according to the customer's needs, making it more flexible.

[0076] Furthermore, the end of the air guide protrusion 9 faces the side of the mounting groove away from the sealing layer 5.

[0077] Furthermore, the air guiding direction of the air guiding channel 10 is consistent with the air outlet direction of the circumferential air outlet 4, which can reduce wind resistance, facilitate air guiding, and achieve better ventilation effect. Under the premise of meeting this requirement, the shape of the air guiding protrusion 9 can also be set to other shapes other than "crescent", all of which are within the protection scope of this patent application.

[0078] Furthermore, the curvature of the air guide channel 10 is consistent with or approximately consistent with the curvature of the fan blades inside the fan 2, so that the direction of the air blown out by the fan 2 is along the air guide channel 10 that is consistent with it, reducing the collision between the air and the air guide channel 10, reducing wind resistance, and increasing the efficiency of air output to a certain extent.

[0079] Furthermore, it also includes:

[0080] The first wire harness hole 11 is located on the air guide plate 8;

[0081] The second wire harness hole 12 is formed on the sealing layer 5;

[0082] The opening of the first wiring harness hole 11 and the second wiring harness hole 12 facilitates the electrical connection of the fan 2 wiring harness with the circuit control structure of the external seat, making it easier to control the start and stop of the fan 2. Specifically, the fan 2 wiring harness passes through the first wiring harness hole 11 and the second wiring harness hole 12 in sequence and is electrically connected to the circuit control structure of the seat.

[0083] Furthermore, when only the sealing layer 5 has an opening corresponding to the axial air inlet 3 and an opening on the air guide plate 8 to facilitate the air intake of the fan 2, the wiring harness can establish a connection with external electrical components through these openings.

[0084] Example 3

[0085] This embodiment, based on embodiment 1, designs the air guide structure as follows: Figure 7 Specifically, as shown, the air guiding structure includes:

[0086] The mounting slot is formed on the support pad 1 and is arranged around the fan 2.

[0087] Three-dimensional knitted mesh fabric 13, which is filled inside the mounting groove;

[0088] Generally, a portion of the material in the three-dimensional knitted mesh fabric 13 needs to be removed to accommodate the fan 2;

[0089] Furthermore, such as Figure 8 As shown, the three-dimensional knitted mesh 13 and the circumferential air outlet 4 are connected by a channel. The opening of the sealing layer 5 exposes the axial air inlet 3 of the fan 2. The remaining part of the sealing layer 5 is connected to the mounting groove and the supporting pad 1 to seal the mounting groove. During ventilation, the air passes sequentially through the axial air inlet 3, the circumferential air outlet 4, and the channels opened on the three-dimensional knitted mesh 13 and the mounting groove, and is finally sent into the ventilation hole 6 to achieve the purpose of ventilation.

[0090] Example 4

[0091] This embodiment, based on embodiment 1, designs the air guide structure as follows: Figure 11 Specifically, as shown, the air guiding structure includes:

[0092] The mounting slot is formed on the support pad 1 and is arranged around the fan 2.

[0093] The mounting groove is provided with several air guide protrusions 9, and the air guide protrusions 9 form a channel that connects with the circumferential air outlet 4 and the ventilation hole 6. The protrusions of the air guide protrusions 9 face the sealing layer 5, and the height of the air guide protrusions 9 is the same as or slightly less than the depth of the mounting groove.

[0094] Specifically, the air guide protrusion 9 can be integrally formed with the bearing pad 1, which is simple and easy to operate; it can be made of the same material as the bearing pad 1 or different materials; the air guide protrusion 9 can also be installed on the bearing pad 1 later, so that the position and shape of the air guide protrusion 9 can be adjusted according to the customer's needs, which is more flexible.

[0095] The specific shape of the air guide protrusion 9 can be the same as the shape of the air guide protrusion 9 described in Example 2.

[0096] Furthermore, this application does not limit the shape of the air guide protrusion 9 in Embodiments 3 and 2, as long as it can play the role of air guide.

[0097] The opening of the sealing layer 5 exposes the axial air inlet 3 of the fan 2. The rest of the sealing layer 5 is connected to the mounting groove and the bearing pad 1 to seal the mounting groove. During ventilation, the air passes through the axial air inlet 3, the circumferential air outlet 4 and the holes provided on the mounting groove in sequence, and is finally sent into the ventilation hole 6 to achieve the purpose of ventilation.

[0098] Furthermore, the curvature of the holes set on the mounting slot is the same as or approximately the same as the curvature of the fan blades inside the fan 2, so that the direction of the air blown out by the fan 2 is along the same holes, reducing the collision between the air and the holes, reducing wind resistance, and increasing the efficiency of air output to a certain extent.

[0099] Furthermore, the holes opened on the mounting groove are rotated multiple times clockwise around the center of the mounting groove, with the first rotation angle as the center point.

[0100] Specifically, the first rotation angle is an acute angle;

[0101] Furthermore, the diameter of the ventilation holes 6 located in the same channel gradually increases from the side closer to the fan 2 to the side farther away from the fan; that is, the air volume at the ventilation holes 6 that are relatively closer to the fan 2 is relatively small, and the air volume at the ventilation holes 6 that are relatively farther away from the fan 2 is relatively large, so that the air volume of the ventilation holes at each position is relatively uniform.

[0102] The extension direction of the line connecting the centers of the ventilation holes 6 located in the same duct is consistent with the air guiding direction of the duct, so as to achieve better ventilation effect.

[0103] Furthermore, in order to prevent the shape of the holes opened on the mounting groove from changing under pressure and affecting the ventilation performance, a three-dimensional knitted mesh can be installed inside the holes.

[0104] Example 5

[0105] This embodiment, based on embodiment 1, designs the air guide structure as follows: Figure 9 Specifically, as shown, the air guiding structure includes:

[0106] The mounting groove is formed on the bearing pad 1;

[0107] The air distribution layer and the air guide pressure-bearing layer are provided. The air distribution layer is provided with air distribution holes. The edges of the air distribution layer and the sealing layer 5 are sealed and connected. The air guide pressure-bearing layer is set between the air distribution layer and the sealing layer 5. The air distribution layer, the air guide pressure-bearing layer and the sealing layer 5 together form a ventilation bag 14. The air guide pressure-bearing layer is provided with a space to accommodate the fan 2.

[0108] A ventilation bag 14 is disposed within a mounting groove; a fan 2 is installed inside the ventilation bag 14, and an opening communicating with an axial air inlet 3 is provided on the ventilation bag 14; for example Figure 10 As shown, the ventilation bag 14 is connected to the circumferential air outlet 4 and the ventilation hole 6. During ventilation, the air passes sequentially through the axial air inlet 3, the circumferential air outlet 4, and the ventilation bag 14, and is finally delivered into the ventilation hole 6 to achieve the purpose of ventilation.

[0109] Here, the sealing layer 5 is part of the ventilation bag 14, that is, the sealing layer 5 is connected to the air distribution layer in the ventilation bag 14; wherein, the air guiding and pressure bearing layer can be a three-dimensional knitted mesh or a plastic plate with protrusions.

[0110] Example 6

[0111] A car seat includes: a seat back body and a seat cushion body; the seat back body and / or seat cushion body are internally provided with a seat ventilation device as described in the above embodiments; such as Figure 2 As shown, taking the seat back body as an example, the seat back body has a supporting spring frame 15 and a soft layer 16, and the surface of the seat back body is covered with a skin 17, forming an accommodating space between the supporting spring frame 15 and the soft layer 16 for accommodating and installing the seat ventilation device described in the above embodiment.

[0112] As can be seen from the above, the car seat has a seat ventilation device as described in the above embodiments, and therefore has the functions and advantages of the above seat ventilation device, which will not be repeated here.

[0113] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A seat ventilation device, characterized in that, include: The support pad (1) has a ventilation area, and a fan (2) is provided in the center of the ventilation area. The fan (2) has an axial air inlet (3) and a circumferential air outlet (4). An air guide structure is provided in the ventilation area; the air guide structure has an opening corresponding to the axial air inlet (3), and the air guide structure is arranged around the fan (2); the air guide structure is connected to the circumferential air outlet (4); A sealing layer (5) is connected to the edge of the air guide structure, and the sealing layer (5) has an opening corresponding to the axial air inlet (3); Ventilation hole (6) is provided in the ventilation area and is connected to the air guiding structure; The air guiding structure includes: an installation groove, which is formed on the bearing pad (1) and is connected to the ventilation hole (6); the edge of the installation groove is connected to the sealing layer (5); An air guide cavity (7) is formed between the mounting groove and the sealing layer (5), and the air guide cavity (7) is connected to the circumferential air outlet (4).

2. A seat ventilation device according to claim 1, characterized in that, The air guiding structure includes: The mounting slot is provided in the ventilation area of ​​the bearing pad (1); Air guide plate (8), the air guide plate (8) is disposed in the mounting groove; the air guide plate (8) has an opening corresponding to the axial air inlet (3), and the fan (2) is installed on the side of the air guide plate (8) close to the bearing pad (1). There are multiple sets of air guide protrusions (9), and the air guide protrusions (9) are arranged on the air guide plate (8) along the circumference of the fan (2); an air guide channel (10) is formed between two adjacent sets of air guide protrusions (9), and the air guide channel (10) is connected to the ventilation hole (6) and the circumferential air outlet (4).

3. A seat ventilation device according to claim 2, characterized in that, The air guiding direction of the air guiding channel (10) is consistent with the air outlet direction of the circumferential air outlet (4).

4. A seat ventilation device according to claim 2, characterized in that, Also includes: The first wire harness hole (11) is opened on the air guide plate (8); The second wire harness hole (12) is formed on the sealing layer (5); The wiring harness of the fan (2) passes through the first wiring harness hole (11) and the second wiring harness hole (12) in sequence and is electrically connected to the circuit control structure of the seat.

5. A seat ventilation device according to claim 1, characterized in that, The air guiding structure includes: The mounting slot is formed on the bearing pad (1) and is arranged around the fan (2); A three-dimensional knitted mesh (13) is filled inside the mounting groove.

6. A seat ventilation device according to claim 1, characterized in that, The air guiding structure includes: The mounting groove is formed on the bearing pad (1); An air distribution layer and an air guide pressure-bearing layer are provided. The air distribution layer is provided with air distribution holes. The edges of the air distribution layer and the sealing layer (5) are sealed together. The air guide pressure-bearing layer is disposed between the air distribution layer and the sealing layer (5). The air distribution layer, the air guide pressure-bearing layer and the sealing layer (5) together form a ventilation bag (14). The air guide pressure-bearing layer is provided with a space to accommodate the fan (2). The ventilation bag (14) is disposed in the mounting groove, and the air distribution layer is in contact with the surface of the mounting groove; the fan (2) is installed in the ventilation bag (14), and the air distribution hole of the ventilation bag (14) is connected to the circumferential air outlet (4) and the ventilation hole (6).

7. A seat ventilation device according to claim 1, characterized in that, The air guiding structure includes: The mounting groove is formed on the bearing pad (1) and the mounting groove is arranged around the fan (2); There are several air guide protrusions (9), which are arranged in the mounting groove; the air guide protrusions (9) form a channel that is connected to the circumferential air outlet (4) and the ventilation hole (6).

8. A seat ventilation device according to claim 1, characterized in that, Within the radius of a circle centered on the center of the fan (2), the diameter of the ventilation hole (6) gradually increases with the increase of the radius.

9. A seat ventilation device according to claim 1, characterized in that, The sealing layer (5) is a non-woven fabric, a non-woven felt, a coated non-woven fabric, a TPU film, or a PU film.

10. A car seat, characterized in that, include: A seat back body and a seat cushion body; the seat back body and / or seat cushion body are provided with a seat ventilation device as described in any one of claims 1 to 9.

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